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Message-Id: <1449016999-9796-11-git-send-email-kys@microsoft.com>
Date: Tue, 1 Dec 2015 16:43:13 -0800
From: "K. Y. Srinivasan" <kys@...rosoft.com>
To: davem@...emloft.net, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
olaf@...fle.de, apw@...onical.com, jasowang@...hat.com
Cc: "K. Y. Srinivasan" <kys@...rosoft.com>
Subject: [PATCH net-next V3 11/17] hv_netvsc: Eliminate page_buf from struct hv_netvsc_packet
Eliminate page_buf from struct hv_netvsc_packet.
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>
---
drivers/net/hyperv/hyperv_net.h | 4 ++--
drivers/net/hyperv/netvsc.c | 25 ++++++++++++++-----------
drivers/net/hyperv/netvsc_drv.c | 11 ++++++-----
drivers/net/hyperv/rndis_filter.c | 26 +++++++++++++-------------
4 files changed, 35 insertions(+), 31 deletions(-)
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index f5b2145..b541455 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -149,7 +149,6 @@ struct hv_netvsc_packet {
u64 send_completion_tid;
- struct hv_page_buffer *page_buf;
};
struct netvsc_device_info {
@@ -188,7 +187,8 @@ int netvsc_device_add(struct hv_device *device, void *additional_info);
int netvsc_device_remove(struct hv_device *device);
int netvsc_send(struct hv_device *device,
struct hv_netvsc_packet *packet,
- struct rndis_message *rndis_msg);
+ struct rndis_message *rndis_msg,
+ struct hv_page_buffer **page_buffer);
void netvsc_linkstatus_callback(struct hv_device *device_obj,
struct rndis_message *resp);
void netvsc_xmit_completion(void *context);
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 081f14f..18058a59 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -702,7 +702,8 @@ static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device,
unsigned int section_index,
u32 pend_size,
struct hv_netvsc_packet *packet,
- struct rndis_message *rndis_msg)
+ struct rndis_message *rndis_msg,
+ struct hv_page_buffer **pb)
{
char *start = net_device->send_buf;
char *dest = start + (section_index * net_device->send_section_size)
@@ -723,9 +724,9 @@ static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device,
}
for (i = 0; i < page_count; i++) {
- char *src = phys_to_virt(packet->page_buf[i].pfn << PAGE_SHIFT);
- u32 offset = packet->page_buf[i].offset;
- u32 len = packet->page_buf[i].len;
+ char *src = phys_to_virt((*pb)[i].pfn << PAGE_SHIFT);
+ u32 offset = (*pb)[i].offset;
+ u32 len = (*pb)[i].len;
memcpy(dest, (src + offset), len);
msg_size += len;
@@ -742,7 +743,8 @@ static u32 netvsc_copy_to_send_buf(struct netvsc_device *net_device,
static inline int netvsc_send_pkt(
struct hv_netvsc_packet *packet,
- struct netvsc_device *net_device)
+ struct netvsc_device *net_device,
+ struct hv_page_buffer **pb)
{
struct nvsp_message nvmsg;
u16 q_idx = packet->q_idx;
@@ -789,8 +791,8 @@ static inline int netvsc_send_pkt(
packet->xmit_more = false;
if (packet->page_buf_cnt) {
- pgbuf = packet->cp_partial ? packet->page_buf +
- packet->rmsg_pgcnt : packet->page_buf;
+ pgbuf = packet->cp_partial ? (*pb) +
+ packet->rmsg_pgcnt : (*pb);
ret = vmbus_sendpacket_pagebuffer_ctl(out_channel,
pgbuf,
packet->page_buf_cnt,
@@ -838,7 +840,8 @@ static inline int netvsc_send_pkt(
int netvsc_send(struct hv_device *device,
struct hv_netvsc_packet *packet,
- struct rndis_message *rndis_msg)
+ struct rndis_message *rndis_msg,
+ struct hv_page_buffer **pb)
{
struct netvsc_device *net_device;
int ret = 0, m_ret = 0;
@@ -891,7 +894,7 @@ int netvsc_send(struct hv_device *device,
if (section_index != NETVSC_INVALID_INDEX) {
netvsc_copy_to_send_buf(net_device,
section_index, msd_len,
- packet, rndis_msg);
+ packet, rndis_msg, pb);
packet->send_buf_index = section_index;
@@ -922,7 +925,7 @@ int netvsc_send(struct hv_device *device,
}
if (msd_send) {
- m_ret = netvsc_send_pkt(msd_send, net_device);
+ m_ret = netvsc_send_pkt(msd_send, net_device, pb);
if (m_ret != 0) {
netvsc_free_send_slot(net_device,
@@ -932,7 +935,7 @@ int netvsc_send(struct hv_device *device,
}
if (cur_send)
- ret = netvsc_send_pkt(cur_send, net_device);
+ ret = netvsc_send_pkt(cur_send, net_device, pb);
if (ret != 0 && section_index != NETVSC_INVALID_INDEX)
netvsc_free_send_slot(net_device, section_index);
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index da3a224..1906f2f 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -323,9 +323,10 @@ static u32 fill_pg_buf(struct page *page, u32 offset, u32 len,
}
static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb,
- struct hv_netvsc_packet *packet)
+ struct hv_netvsc_packet *packet,
+ struct hv_page_buffer **page_buf)
{
- struct hv_page_buffer *pb = packet->page_buf;
+ struct hv_page_buffer *pb = *page_buf;
u32 slots_used = 0;
char *data = skb->data;
int frags = skb_shinfo(skb)->nr_frags;
@@ -436,6 +437,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
u32 hash;
u32 skb_length;
struct hv_page_buffer page_buf[MAX_PAGE_BUFFER_COUNT];
+ struct hv_page_buffer *pb = page_buf;
struct netvsc_stats *tx_stats = this_cpu_ptr(net_device_ctx->tx_stats);
/* We will atmost need two pages to describe the rndis
@@ -482,7 +484,6 @@ check_size:
packet->xmit_more = skb->xmit_more;
packet->vlan_tci = skb->vlan_tci;
- packet->page_buf = page_buf;
packet->q_idx = skb_get_queue_mapping(skb);
@@ -621,9 +622,9 @@ do_send:
rndis_msg->msg_len += rndis_msg_size;
packet->total_data_buflen = rndis_msg->msg_len;
packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size,
- skb, packet);
+ skb, packet, &pb);
- ret = netvsc_send(net_device_ctx->device_ctx, packet, rndis_msg);
+ ret = netvsc_send(net_device_ctx->device_ctx, packet, rndis_msg, &pb);
drop:
if (ret == 0) {
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index c8af172..6ff2253 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -210,6 +210,7 @@ static int rndis_filter_send_request(struct rndis_device *dev,
int ret;
struct hv_netvsc_packet *packet;
struct hv_page_buffer page_buf[2];
+ struct hv_page_buffer *pb = page_buf;
/* Setup the packet to send it */
packet = &req->pkt;
@@ -217,30 +218,29 @@ static int rndis_filter_send_request(struct rndis_device *dev,
packet->is_data_pkt = false;
packet->total_data_buflen = req->request_msg.msg_len;
packet->page_buf_cnt = 1;
- packet->page_buf = page_buf;
- packet->page_buf[0].pfn = virt_to_phys(&req->request_msg) >>
+ pb[0].pfn = virt_to_phys(&req->request_msg) >>
PAGE_SHIFT;
- packet->page_buf[0].len = req->request_msg.msg_len;
- packet->page_buf[0].offset =
+ pb[0].len = req->request_msg.msg_len;
+ pb[0].offset =
(unsigned long)&req->request_msg & (PAGE_SIZE - 1);
/* Add one page_buf when request_msg crossing page boundary */
- if (packet->page_buf[0].offset + packet->page_buf[0].len > PAGE_SIZE) {
+ if (pb[0].offset + pb[0].len > PAGE_SIZE) {
packet->page_buf_cnt++;
- packet->page_buf[0].len = PAGE_SIZE -
- packet->page_buf[0].offset;
- packet->page_buf[1].pfn = virt_to_phys((void *)&req->request_msg
- + packet->page_buf[0].len) >> PAGE_SHIFT;
- packet->page_buf[1].offset = 0;
- packet->page_buf[1].len = req->request_msg.msg_len -
- packet->page_buf[0].len;
+ pb[0].len = PAGE_SIZE -
+ pb[0].offset;
+ pb[1].pfn = virt_to_phys((void *)&req->request_msg
+ + pb[0].len) >> PAGE_SHIFT;
+ pb[1].offset = 0;
+ pb[1].len = req->request_msg.msg_len -
+ pb[0].len;
}
packet->completion_func = 0;
packet->xmit_more = false;
- ret = netvsc_send(dev->net_dev->dev, packet, NULL);
+ ret = netvsc_send(dev->net_dev->dev, packet, NULL, &pb);
return ret;
}
--
1.7.4.1
--
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